I have an Ash Dual intake ECU and Doolz intake waiting to go on but I can't decide whether or not to use my SAFC2 and my spare MAF to correct AF with the dual intake chip. Seems to overkill or unnecessary but also would *seem* to be bit of insurance on the AF ratio, not sure. I am no where near the 450 mark so I was wondering about that too. Not sure how beneficial the dual intake is with stock IC's either.